Hair brush bristle portion



FIG. 1 is a top, front and left side perspective view of our new design for a hair brush bristle portion;

FIG. 2 is a top plan view of the hair brush bristle portion shown in FIG. 1;

FIG. 3 is a bottom plan view of the hair brush bristle portion shown in FIG. 1;

FIG. 4 is a left side elevation view of the hair brush bristle portion shown in FIG. 1;

FIG. 5 is a right side elevation view of the hair brush bristle portion shown in FIG. 1;

FIG. 6 is a front elevation view of the hair brush bristle portion shown in FIG. 1; and,

FIG. 7 is a rear elevation view of the hair brush bristle portion shown in FIG. 1.

The broken lines showing a handle illustrate environmental structure that forms no part of the claimed design. 

The ornamental design for a hair brush bristle portion, substantially as shown and described. 